FIG. 6. Agglomerates of ‘irite’. (a). NHMV. ‘Irite’ agglomerate composed of chromite and silica fragments (various shades of grey), iridium and osmium grains, and lamellae bound together by ‘irite’. The smaller particles at the right of the main body were detached during mounting. Hand mt. SEM(SM). 550 µm. (b) NHMV. Fluffy ‘irite’ agglomerate composed of chromite, silica, Ir-Fe oxides and metal grains and lamellae. Pol. sect. SEM(BS). 700 µm. (c) ENSM-6774. Compact particle composed of ‘irite’ (large light grey spot to the right, and unresolved web), chromite and silica fragments (grey particles) and metals (white spots). Pol. sect. SEM(SM). 150 µm. (d) ENSM-6774. Blowup of the same particle, showing the mixed character of the ‘irite’ field (white metallic grains, dark grey silica and light grey ‘irite’. This ‘irite’ displays a dark bronze colour under reflected light) 1300 µm.